Current issues with Ritalin and Child weight

My nephew is a 10 year old boy weighing 49lbs. He has been on the Ritalin drugs for 3 years at least and his dosage is an adult or larger size. over the past year he has not gained any weight and has been having increasingly more problem about eating meals. Is is the drug causing him not too eat more, or his just being picky and having many choices at meals when at each parents house. I am sure big Pharma has a study to prove its the later, I read in a new report that said they need to study the effect taking these drugs will have on young childs physical development and brains development. It has been on the market for over 30 years and the Big pharma is not ever going to publish any report about brain development delays caused buy these ADHD drugs. It is obvious the doctors haves millions of patient records, growth charts simply. If we could request them, take away the names and just see how much they all correspond. I am certain because, as i took these ADD drugs growing up, including Cylert and Ritalin. All during my childhood, it was still new then, I would visit the doctor on monthly and then quarterly visits. I watched the growth charts, and i grew slower, i would say it delayed my growth. I was also a bit older then my nephew, I was a chubby little middle schooler, and by senior year of High school i was skinny, and it was due to not eating, i just wasn't hungry anymore. No give this drug to a skinny 5 year old and he stops growing at 5, wow, a normal age 10 year old should weigh about 70 lbs, He is at 49 lbs, That's a massive difference. I see it, why doesn't the doctors see it and due something. The doseage is just 3 times what he needs. Yet nothing, because big phamra took away the black box warning label and parent think all these medicines and pills they give their children will be safe and effective at making them behave and be better. Really i takes parenting and proper eating. Most of what i think was my symptoms may have been cause from candy addictions as a child, I would sneak out and buy candy and snacks, and now we know the die used in them, like yellow and red and causing similar symptoms to A.D.D. and A.D.H.D. So if you take these pills for a long time i am sure that you can and will be delayed in development. I was along the normal growth rate on the chart when i went to my doctor and i watched my curve turn down as i took the drugs into my teen years over ten years. Is this similar to anyone else, Do you have growth charts to post on the my blog, If you can find them please share, it only takes a million comments to make the news.